JPS61144220U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図および第２図は本考案に係る内燃機関の
冷却装置の一つの実施例を異なる作動状態にて示
す概略構成図、第３図はその冷却水温度特性を模
式的に表す図、第４図および第５図は本考案に係
る内燃機関の冷却装置の他の一つの実施例を同様
に異なる作動状態にて示す概略構成図である。 １…火花点火式内燃機関、２…シリンダヘツド
、３…シリンダブロツク、４…ヘツド側冷却水通
路、４ａ…低温ヘツド側冷却水通路、４ｂ…高温
ヘツド側冷却水通路、５…ブロツク側冷却水通路
、１０…冷却水ポンプ、１３…第一の感温弁、１
８…ラジエータ、２４…第二の感温弁、３０，３
４…第三の感温弁、３１…バイパス通路。 1 and 2 are schematic configuration diagrams showing one embodiment of the cooling system for an internal combustion engine according to the present invention in different operating states; FIG. 3 is a diagram schematically representing the cooling water temperature characteristics; 4 and 5 are schematic configuration diagrams showing another embodiment of the cooling device for an internal combustion engine according to the present invention in different operating states. DESCRIPTION OF SYMBOLS 1...Spark ignition internal combustion engine, 2...Cylinder head, 3...Cylinder block, 4...Head side cooling water passage, 4a...Low temperature head side cooling water passage, 4b...High temperature head side cooling water passage, 5...Block side cooling water Passage, 10...Cooling water pump, 13...First temperature-sensitive valve, 1
8...Radiator, 24...Second temperature-sensitive valve, 30,3
4...Third temperature-sensitive valve, 31...Bypass passage.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] シリンダヘツドに設けられたヘツド側冷却水通
路と、シリンダブロツクに設けられたブロツク側
冷却水通路と、前記ヘツド側冷却水通路と前記ブ
ロツク側冷却水通路の各々へ冷却水を循環式に供
給する一つの冷却水ポンプと、ラジエータと、前
記ヘツド側冷却水通路を流れた冷却水の温度が第
一の所定値以上であるときには前記ヘツド側冷却
水通路と前記冷却水ポンプと前記ラジエータとを
互いに直列に接続した冷却水循環路を成立せしめ
、該温度が前記第一の所定値に満たないときには
前記ラジエータを含むことなく前記ヘツド側冷却
水通路と前記冷却水ポンプとを互いに直列に接続
した冷却水循環路を成立せしめる第一の感温弁と
、前記ブロツク側冷却水通路を流れた冷却水の温
度が前記第一の所定値より高い第二の所定値以上
であるときには前記ブロツク側冷却水通路と前記
ラジエータと前記冷却水ポンプとを互いに直列に
接続した冷却水循環路を成立せしめ、該温度が前
記第二の所定値に満たないときには前記ラジエー
タを含むことなく前記ブロツク側冷却水通路と前
記冷却水ポンプとを互いに直列に接続した冷却水
循環路を成立せしめる第二の感温弁と、前記ブロ
ツク側冷却水通路の冷却水の温度が前記第二の所
定値より高い第三の所定値以上であるときには前
記ヘツド側冷却水通路を含むことなく前記ラジエ
ータから前記冷却水ポンプへのバイパス通路を成
立せしめる第三の感温弁とを有している内燃機関
の冷却装置。 Cooling water is supplied in a circulating manner to the head side cooling water passage provided in the cylinder head, the block side cooling water passage provided in the cylinder block, and each of the head side cooling water passage and the block side cooling water passage. When the temperature of the cooling water flowing through one cooling water pump, the radiator, and the head side cooling water passage is equal to or higher than a first predetermined value, the head side cooling water passage, the cooling water pump, and the radiator are connected to each other. a cooling water circulation path connected in series, and when the temperature is less than the first predetermined value, the head side cooling water path and the cooling water pump are connected in series without including the radiator; a first temperature-sensitive valve that establishes a flow path; A cooling water circulation path is established in which the radiator and the cooling water pump are connected in series with each other, and when the temperature is less than the second predetermined value, the cooling water passage and the cooling water are connected to the block side cooling water passage without including the radiator. a second temperature-sensitive valve that connects the pump in series to form a cooling water circulation path, and the temperature of the cooling water in the block-side cooling water passage is equal to or higher than a third predetermined value that is higher than the second predetermined value; and a third temperature-sensitive valve for establishing a bypass passage from the radiator to the cooling water pump, sometimes without including the head side cooling water passage.